You know all that hullabaloo always going on regarding the merits of breastfeeding? It seems that breast milk is only going to make your kid smarter if they are genetically predisposed to, uh, be smarter. A gene that influences how we process nutrients has been identified. And when it's present in a child who has been breastfed, that kid has higher IQ. But if it's not there, a child doesn't benefit, IQ-wise, from breastfeeding at all. So what does that mean for mommies? When it comes to feeding your kids, do whatever the hell you want. Except you, Britney. [NYT]